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/*
Copyright (c) 2000, 2012, Oracle and/or its affiliates.
Copyright (c) 2019, 2021, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
/* There may be problems included in all of these. Try to test in
configure which ones are needed? */
/* This is needed for the definitions of strchr... on solaris */
#ifndef _m_string_h
#define _m_string_h
#include "my_decimal_limits.h"
#ifndef __USE_GNU
#define __USE_GNU /* We want to use stpcpy */
#endif
#if defined(HAVE_STRINGS_H)
#include <strings.h>
#endif
#if defined(HAVE_STRING_H)
#include <string.h>
#endif
/* This is needed for the definitions of memcpy... on solaris */
#if defined(HAVE_MEMORY_H) && !defined(__cplusplus)
#include <memory.h>
#endif
#if !defined(HAVE_MEMCPY) && !defined(HAVE_MEMMOVE)
# define memcpy(d, s, n) bcopy ((s), (d), (n))
# define memset(A,C,B) bfill((A),(B),(C))
# define memmove(d, s, n) bmove ((d), (s), (n))
#elif defined(HAVE_MEMMOVE)
# define bmove(d, s, n) memmove((d), (s), (n))
#endif
/* Unixware 7 */
#if !defined(HAVE_BFILL)
# define bfill(A,B,C) memset((A),(C),(B))
#endif
# define bmove_align(A,B,C) memcpy((A),(B),(C))
# define bcmp(A,B,C) memcmp((A),(B),(C))
#if !defined(bzero)
# define bzero(A,B) memset((A),0,(B))
#endif
#if defined(__cplusplus)
extern "C" {
#endif
#ifdef DBUG_OFF
#if defined(HAVE_STPCPY) && defined(__GNUC__) && !defined(__INTEL_COMPILER)
#define strmov(A,B) __builtin_stpcpy((A),(B))
#elif defined(HAVE_STPCPY)
#define strmov(A,B) stpcpy((A),(B))
#endif
#endif
/* Declared in int2str() */
extern const char _dig_vec_upper[];
extern const char _dig_vec_lower[];
extern char *strmov_overlapp(char *dest, const char *src);
#if defined(_lint) || defined(FORCE_INIT_OF_VARS)
#define LINT_INIT_STRUCT(var) bzero(&var, sizeof(var)) /* No uninitialize-warning */
#else
#define LINT_INIT_STRUCT(var)
#endif
/* Prototypes for string functions */
extern void bmove_upp(uchar *dst,const uchar *src,size_t len);
extern void bchange(uchar *dst,size_t old_len,const uchar *src,
size_t new_len,size_t tot_len);
extern void strappend(char *s,size_t len,pchar fill);
extern char *strend(const char *s);
extern char *strcend(const char *, pchar);
extern char *strfill(char * s,size_t len,pchar fill);
extern char *strmake(char *dst,const char *src,size_t length);
#if !defined(__GNUC__) || (__GNUC__ < 4)
#define strmake_buf(D,S) strmake(D, S, sizeof(D) - 1)
#else
#define strmake_buf(D,S) ({ \
__typeof__ (D) __x __attribute__((unused)) = { 2 }; \
strmake(D, S, sizeof(D) - 1); \
})
#endif
#ifndef strmov
extern char *strmov(char *dst,const char *src);
#endif
extern char *strnmov(char *dst, const char *src, size_t n);
extern char *strcont(const char *src, const char *set);
extern char *strxmov(char *dst, const char *src, ...);
extern char *strxnmov(char *dst, size_t len, const char *src, ...);
/* Prototypes of normal stringfunctions (with may ours) */
#ifndef HAVE_STRNLEN
extern size_t strnlen(const char *s, size_t n);
#endif
extern int is_prefix(const char *, const char *);
/* Conversion routines */
typedef enum {
MY_GCVT_ARG_FLOAT,
MY_GCVT_ARG_DOUBLE
} my_gcvt_arg_type;
double my_strtod(const char *str, char **end, int *error);
double my_atof(const char *nptr);
size_t my_fcvt(double x, int precision, char *to, my_bool *error);
size_t my_gcvt(double x, my_gcvt_arg_type type, int width, char *to,
my_bool *error);
/*
The longest string my_fcvt can return is 311 + "precision" bytes.
Here we assume that we never cal my_fcvt() with
precision >= DECIMAL_NOT_SPECIFIED
(+ 1 byte for the terminating '\0').
*/
#define FLOATING_POINT_BUFFER (311 + DECIMAL_NOT_SPECIFIED)
/*
We want to use the 'e' format in some cases even if we have enough space
for the 'f' one just to mimic sprintf("%.15g") behavior for large integers,
and to improve it for numbers < 10^(-4).
That is, for |x| < 1 we require |x| >= 10^(-15), and for |x| > 1 we require
it to be integer and be <= 10^DBL_DIG for the 'f' format to be used.
We don't lose precision, but make cases like "1e200" or "0.00001" look nicer.
*/
#define MAX_DECPT_FOR_F_FORMAT DBL_DIG
/*
The maximum possible field width for my_gcvt() conversion.
(DBL_DIG + 2) significant digits + sign + "." + ("e-NNN" or
MAX_DECPT_FOR_F_FORMAT zeros for cases when |x|<1 and the 'f' format is used).
*/
#define MY_GCVT_MAX_FIELD_WIDTH (DBL_DIG + 4 + MY_MAX(5, MAX_DECPT_FOR_F_FORMAT)) \
extern char *llstr(longlong value,char *buff);
extern char *ullstr(longlong value,char *buff);
#ifndef HAVE_STRTOUL
extern long strtol(const char *str, char **ptr, int base);
extern ulong strtoul(const char *str, char **ptr, int base);
#endif
extern char *int2str(long val, char *dst, int radix, int upcase);
extern char *int10_to_str(long val,char *dst,int radix);
extern char *str2int(const char *src,int radix,long lower,long upper,
long *val);
longlong my_strtoll10(const char *nptr, char **endptr, int *error);
#if SIZEOF_LONG == SIZEOF_LONG_LONG
#define ll2str(A,B,C,D) int2str((A),(B),(C),(D))
#define longlong10_to_str(A,B,C) int10_to_str((A),(B),(C))
#undef strtoll
#define strtoll(A,B,C) strtol((A),(B),(C))
#define strtoull(A,B,C) strtoul((A),(B),(C))
#ifndef HAVE_STRTOULL
#define HAVE_STRTOULL
#endif
#ifndef HAVE_STRTOLL
#define HAVE_STRTOLL
#endif
#else
#ifdef HAVE_LONG_LONG
extern char *ll2str(longlong val,char *dst,int radix, int upcase);
extern char *longlong10_to_str(longlong val,char *dst,int radix);
#if (!defined(HAVE_STRTOULL) || defined(NO_STRTOLL_PROTO))
extern longlong strtoll(const char *str, char **ptr, int base);
extern ulonglong strtoull(const char *str, char **ptr, int base);
#endif
#endif
#endif
#define longlong2str(A,B,C) ll2str((A),(B),(C),1)
#if defined(__cplusplus)
}
#endif
#include <mysql/plugin.h>
#ifdef __cplusplus
#include <type_traits>
template<typename T> inline const char *_swl_check(T s)
{
static_assert(std::is_same<T, const char (&)[sizeof(T)]>::value
|| std::is_same<T, const char [sizeof(T)]>::value,
"Wrong argument for STRING_WITH_LEN()");
return s;
}
#define STRING_WITH_LEN(X) _swl_check<decltype(X)>(X), ((size_t) (sizeof(X) - 1))
#else
#define STRING_WITH_LEN(X) (X ""), ((size_t) (sizeof(X) - 1))
#endif
#define USTRING_WITH_LEN(X) (uchar*) STRING_WITH_LEN(X)
#define C_STRING_WITH_LEN(X) (char *) STRING_WITH_LEN(X)
#define LEX_STRING_WITH_LEN(X) (X).str, (X).length
typedef struct st_mysql_const_lex_string LEX_CSTRING;
/* A variant with const and unsigned */
struct st_mysql_const_unsigned_lex_string
{
const uchar *str;
size_t length;
};
typedef struct st_mysql_const_unsigned_lex_string LEX_CUSTRING;
static inline void lex_string_set(LEX_CSTRING *lex_str, const char *c_str)
{
lex_str->str= c_str;
lex_str->length= strlen(c_str);
}
static inline void lex_string_set3(LEX_CSTRING *lex_str, const char *c_str,
size_t len)
{
lex_str->str= c_str;
lex_str->length= len;
}
/**
Copies a string.
@param dst destination buffer, will be NUL padded.
@param dst_size size of dst buffer, must be > 0
@param src NUL terminated source string
*/
static inline void safe_strcpy(char *dst, size_t dst_size, const char *src)
{
DBUG_ASSERT(dst_size > 0);
/* 1) IF there is a 0 byte in the first dst_size bytes of src, strncpy will
* 0-terminate dst, and pad dst with additional 0 bytes out to dst_size.
*
* 2) IF there is no 0 byte in the first dst_size bytes of src, strncpy will
* copy dst_size bytes, and the final byte won't be 0.
*/
strncpy(dst, src, dst_size);
dst[dst_size - 1]= 0;
}
/**
Copies a string, checking for truncation.
@param dst destination buffer, will be NUL padded.
@param dst_size size of dst buffer, must be > 0
@param src NUL terminated source string
@retval 1 if the src string was truncated due to too small size of dst.
@retval 0 if src completely fit within dst,
*/
static inline int safe_strcpy_truncated(char *dst, size_t dst_size,
const char *src)
{
DBUG_ASSERT(dst_size > 0);
strncpy(dst, src, dst_size);
if (dst[dst_size - 1])
{
dst[dst_size - 1]= 0;
return 1;
}
return 0;
}
/**
Appends src to dst and ensures dst is a NUL terminated C string.
@retval 1 if the src string was truncated due to too small size of dst.
@retval 0 if src completely fit within the remaining dst space,
including NUL termination.
*/
static inline int safe_strcat(char *dst, size_t dst_size, const char *src)
{
size_t init_len= strlen(dst);
if (init_len > dst_size)
return 1;
return safe_strcpy_truncated(dst + init_len, dst_size - init_len, src);
}
#ifdef __cplusplus
static inline char *safe_str(char *str)
{ return str ? str : const_cast<char*>(""); }
#endif
static inline const char *safe_str(const char *str)
{ return str ? str : ""; }
static inline size_t safe_strlen(const char *str)
{ return str ? strlen(str) : 0; }
#endif
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